git.sur5r.net Git - openldap/blob - servers/slapd/daemon.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2006 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  *
  18  * Redistribution and use in source and binary forms are permitted
  19  * provided that this notice is preserved and that due credit is given
  20  * to the University of Michigan at Ann Arbor. The name of the University
  21  * may not be used to endorse or promote products derived from this
  22  * software without specific prior written permission. This software
  23  * is provided ``as is'' without express or implied warranty.
  24  */
  25
  26 #include "portable.h"
  27
  28 #include <stdio.h>
  29
  30 #include <ac/ctype.h>
  31 #include <ac/errno.h>
  32 #include <ac/socket.h>
  33 #include <ac/string.h>
  34 #include <ac/time.h>
  35 #include <ac/unistd.h>
  36
  37 #include "slap.h"
  38 #include "ldap_pvt_thread.h"
  39 #include "lutil.h"
  40
  41 #include "ldap_rq.h"
  42
  43 #if defined(HAVE_SYS_EPOLL_H) && defined(HAVE_EPOLL)
  44 # include <sys/epoll.h>
  45 #endif
  46
  47 #ifdef HAVE_TCPD
  48 # include <tcpd.h>
  49 int allow_severity = LOG_INFO;
  50 int deny_severity = LOG_NOTICE;
  51
  52 # define SLAP_STRING_UNKNOWN    STRING_UNKNOWN
  53 #else /* ! TCP Wrappers */
  54 # define SLAP_STRING_UNKNOWN    "unknown"
  55 #endif /* ! TCP Wrappers */
  56
  57 #ifdef LDAP_PF_LOCAL
  58 # include <sys/stat.h>
  59 /* this should go in <ldap.h> as soon as it is accepted */
  60 # define LDAPI_MOD_URLEXT               "x-mod"
  61 #endif /* LDAP_PF_LOCAL */
  62
  63 #ifdef LDAP_PF_INET6
  64 int slap_inet4or6 = AF_UNSPEC;
  65 #else
  66 int slap_inet4or6 = AF_INET;
  67 #endif
  68
  69 /* globals */
  70 time_t starttime;
  71 ber_socket_t dtblsize;
  72 slap_ssf_t local_ssf = LDAP_PVT_SASL_LOCAL_SSF;
  73 struct runqueue_s slapd_rq;
  74
  75 Listener **slap_listeners = NULL;
  76
  77 #ifndef SLAPD_LISTEN_BACKLOG
  78 #define SLAPD_LISTEN_BACKLOG 1024
  79 #endif
  80
  81 static ber_socket_t wake_sds[2];
  82 static int emfile;
  83
  84 static volatile int waking;
  85 #ifdef NO_THREADS
  86 #define WAKE_LISTENER(w)        do { \
  87         if ((w) && ++waking < 5) { \
  88                 tcp_write( wake_sds[1], "0", 1 ); \
  89         } \
  90 } while(0)
  91 #else
  92 #define WAKE_LISTENER(w)        do { \
  93         if (w) { \
  94                 tcp_write( wake_sds[1], "0", 1 ); \
  95         } \
  96 } while(0)
  97 #endif
  98
  99 volatile sig_atomic_t slapd_shutdown = 0;
 100 volatile sig_atomic_t slapd_gentle_shutdown = 0;
 101 volatile sig_atomic_t slapd_abrupt_shutdown = 0;
 102
 103 static struct slap_daemon {
 104         ldap_pvt_thread_mutex_t sd_mutex;
 105 #ifdef HAVE_TCPD
 106         ldap_pvt_thread_mutex_t tcpd_mutex;
 107 #endif
 108
 109         ber_socket_t sd_nactives;
 110         int sd_nwriters;
 111
 112 #ifdef HAVE_EPOLL
 113         struct epoll_event *sd_epolls;
 114         int     sd_nepolls;
 115         int     *sd_index;
 116         int     sd_epfd;
 117         int     sd_nfds;
 118 #else
 119 #ifndef HAVE_WINSOCK
 120         /* In winsock, accept() returns values higher than dtblsize
 121                 so don't bother with this optimization */
 122         int sd_nfds;
 123 #endif
 124         fd_set sd_actives;
 125         fd_set sd_readers;
 126         fd_set sd_writers;
 127 #endif
 128 } slap_daemon;
 129
 130 #ifdef HAVE_EPOLL
 131 # define SLAP_EVENTS_ARE_INDEXED        0
 132 # define SLAP_SOCK_IX(s)        (slap_daemon.sd_index[(s)])
 133 # define SLAP_SOCK_EP(s)        (slap_daemon.sd_epolls[SLAP_SOCK_IX(s)])
 134 # define SLAP_SOCK_EV(s)        (SLAP_SOCK_EP(s).events)
 135 # define SLAP_SOCK_IS_ACTIVE(s) (SLAP_SOCK_IX(s) != -1)
 136 # define SLAP_SOCK_NOT_ACTIVE(s)        (SLAP_SOCK_IX(s) == -1)
 137 # define SLAP_SOCK_IS_SET(s, mode)      (SLAP_SOCK_EV(s) & (mode))
 138
 139 # define SLAP_SOCK_IS_READ(s)   SLAP_SOCK_IS_SET((s), EPOLLIN)
 140 # define SLAP_SOCK_IS_WRITE(s)  SLAP_SOCK_IS_SET((s), EPOLLOUT)
 141
 142 # define SLAP_SET_SOCK(s, mode) do { \
 143         if ((SLAP_SOCK_EV(s) & (mode)) != (mode)) {     \
 144                 SLAP_SOCK_EV(s) |= (mode); \
 145                 epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_MOD, (s), \
 146                         &SLAP_SOCK_EP(s)); \
 147         } \
 148 } while(0)
 149
 150 # define SLAP_CLR_SOCK(s, mode) do { \
 151         if ((SLAP_SOCK_EV(s) & (mode))) { \
 152                 SLAP_SOCK_EV(s) &= ~(mode);     \
 153                 epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_MOD, s, \
 154                         &SLAP_SOCK_EP(s)); \
 155         } \
 156 } while(0)
 157
 158 # define SLAP_SOCK_SET_READ(s)  SLAP_SET_SOCK(s, EPOLLIN)
 159 # define SLAP_SOCK_SET_WRITE(s) SLAP_SET_SOCK(s, EPOLLOUT)
 160
 161 # ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 162 #  define SLAP_SOCK_SET_SUSPEND(s) \
 163         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] = 1 )
 164 #  define SLAP_SOCK_CLR_SUSPEND(s) \
 165         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] = 0 )
 166 #  define SLAP_SOCK_IS_SUSPEND(s) \
 167         ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] == 1 )
 168 # endif
 169
 170 # define SLAP_SOCK_CLR_READ(s)  SLAP_CLR_SOCK((s), EPOLLIN)
 171 # define SLAP_SOCK_CLR_WRITE(s) SLAP_CLR_SOCK((s), EPOLLOUT)
 172
 173 # define SLAP_CLR_EVENT(i, mode)        (revents[(i)].events &= ~(mode))
 174
 175 # define SLAP_EVENT_MAX slap_daemon.sd_nfds
 176
 177 /* If a Listener address is provided, store that as the epoll data.
 178  * Otherwise, store the address of this socket's slot in the
 179  * index array. If we can't do this add, the system is out of
 180  * resources and we need to shutdown.
 181  */
 182 # define SLAP_ADD_SOCK(s, l) do { \
 183         int rc; \
 184         SLAP_SOCK_IX((s)) = slap_daemon.sd_nfds; \
 185         SLAP_SOCK_EP((s)).data.ptr = (l) ? (l) : (void *)(&SLAP_SOCK_IX(s)); \
 186         SLAP_SOCK_EV((s)) = EPOLLIN; \
 187         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_ADD, \
 188                 (s), &SLAP_SOCK_EP((s))); \
 189         if ( rc == 0 ) { \
 190                 slap_daemon.sd_nfds++; \
 191         } else { \
 192                 Debug( LDAP_DEBUG_ANY, \
 193                         "daemon: epoll_ctl(ADD,fd=%d) failed, errno=%d, shutting down\n", \
 194                         s, errno, 0 ); \
 195                 slapd_shutdown = 2; \
 196         } \
 197 } while (0)
 198
 199 # define SLAP_EV_LISTENER(ptr) (((int *)(ptr) >= slap_daemon.sd_index && \
 200         (int *)(ptr) <= (slap_daemon.sd_index+dtblsize)) ? 0 : 1 )
 201
 202 # define SLAP_EV_PTRFD(ptr) (SLAP_EV_LISTENER(ptr) ? \
 203         ((Listener *)ptr)->sl_sd : (int *)(ptr) - slap_daemon.sd_index)
 204
 205 # define SLAP_DEL_SOCK(s) do { \
 206         int fd, rc, index = SLAP_SOCK_IX((s)); \
 207         if ( index < 0 ) break; \
 208         rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_DEL, \
 209                 (s), &SLAP_SOCK_EP((s))); \
 210         slap_daemon.sd_epolls[index] = \
 211                 slap_daemon.sd_epolls[slap_daemon.sd_nfds-1]; \
 212         fd = SLAP_EV_PTRFD(slap_daemon.sd_epolls[index].data.ptr); \
 213         slap_daemon.sd_index[fd] = index; \
 214         slap_daemon.sd_index[(s)] = -1; \
 215         slap_daemon.sd_nfds--; \
 216 } while (0)
 217
 218 # define SLAP_EVENT_CLR_READ(i) SLAP_CLR_EVENT((i), EPOLLIN)
 219 # define SLAP_EVENT_CLR_WRITE(i)        SLAP_CLR_EVENT((i), EPOLLOUT)
 220
 221 # define SLAP_CHK_EVENT(i, mode)        (revents[(i)].events & mode)
 222
 223 # define SLAP_EVENT_IS_READ(i)  SLAP_CHK_EVENT((i), EPOLLIN)
 224 # define SLAP_EVENT_IS_WRITE(i) SLAP_CHK_EVENT((i), EPOLLOUT)
 225 # define SLAP_EVENT_IS_LISTENER(i)      SLAP_EV_LISTENER(revents[(i)].data.ptr)
 226 # define SLAP_EVENT_LISTENER(i) ((Listener *)(revents[(i)].data.ptr))
 227
 228 # define SLAP_EVENT_FD(i)       SLAP_EV_PTRFD(revents[(i)].data.ptr)
 229
 230 # define SLAP_SOCK_SET_INIT do { \
 231         slap_daemon.sd_epolls = ch_calloc(1, \
 232                 sizeof(struct epoll_event) * dtblsize * 2); \
 233         slap_daemon.sd_index = ch_malloc(sizeof(int) * dtblsize); \
 234         slap_daemon.sd_epfd = epoll_create( dtblsize ); \
 235         for (i=0; i<dtblsize; i++) slap_daemon.sd_index[i] = -1; \
 236 } while (0)
 237
 238 # define SLAP_EVENT_DECL struct epoll_event *revents
 239
 240 # define SLAP_EVENT_INIT do { \
 241         revents = slap_daemon.sd_epolls + dtblsize; \
 242 } while (0)
 243
 244 # define SLAP_EVENT_WAIT(tvp) \
 245         epoll_wait( slap_daemon.sd_epfd, revents, \
 246                 dtblsize, (tvp) ? (tvp)->tv_sec * 1000 : -1 )
 247
 248 #else
 249 /* select */
 250
 251 # define SLAP_EVENTS_ARE_INDEXED 1
 252 # define SLAP_EVENT_DECL        \
 253         fd_set readfds, writefds
 254
 255 # define SLAP_EVENT_INIT do { \
 256         AC_MEMCPY( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) ); \
 257         if ( nwriters ) { \
 258                 AC_MEMCPY( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) ); \
 259         } else { \
 260                 FD_ZERO( &writefds ); \
 261         } \
 262 } while (0)
 263
 264 # ifdef FD_SETSIZE
 265 #  define       CHK_SETSIZE do { \
 266         if (dtblsize > FD_SETSIZE) dtblsize = FD_SETSIZE; \
 267 } while (0)
 268 # else
 269 #  define        CHK_SETSIZE do { ; } while (0)
 270 # endif
 271
 272 # define        SLAP_SOCK_SET_INIT do { \
 273         CHK_SETSIZE; \
 274         FD_ZERO(&slap_daemon.sd_readers); \
 275         FD_ZERO(&slap_daemon.sd_writers); \
 276 } while (0)
 277
 278 # define SLAP_SOCK_IS_ACTIVE(fd)        FD_ISSET((fd), &slap_daemon.sd_actives)
 279 # define SLAP_SOCK_IS_READ(fd)          FD_ISSET((fd), &slap_daemon.sd_readers)
 280 # define SLAP_SOCK_IS_WRITE(fd)         FD_ISSET((fd), &slap_daemon.sd_writers)
 281
 282 # define SLAP_SOCK_NOT_ACTIVE(fd)       (!SLAP_SOCK_IS_ACTIVE(fd) && \
 283          !SLAP_SOCK_IS_READ(fd) && !SLAP_SOCK_IS_WRITE(fd))
 284
 285 # ifdef HAVE_WINSOCK
 286 #  define SLAP_SOCK_SET_READ(fd)        do { \
 287         if (!SLAP_SOCK_IS_READ(fd)) { FD_SET((fd), &slap_daemon.sd_readers); } \
 288 } while(0)
 289 #  define SLAP_SOCK_SET_WRITE(fd)       do { \
 290         if (!SLAP_SOCK_IS_WRITE(fd)) { FD_SET((fd), &slap_daemon.sd_writers); } \
 291 } while(0)
 292
 293 #  define SLAP_ADDTEST(s)
 294 #  define SLAP_EVENT_MAX        dtblsize
 295 # else
 296 #  define SLAP_SOCK_SET_READ(fd)        FD_SET((fd), &slap_daemon.sd_readers)
 297 #  define SLAP_SOCK_SET_WRITE(fd)       FD_SET((fd), &slap_daemon.sd_writers)
 298
 299 #  define SLAP_EVENT_MAX        slap_daemon.sd_nfds
 300 #  define SLAP_ADDTEST(s)       do { \
 301         if ((s) >= slap_daemon.sd_nfds) slap_daemon.sd_nfds = (s)+1; \
 302 } while (0)
 303 # endif
 304
 305 # define SLAP_SOCK_CLR_READ(fd)         FD_CLR((fd), &slap_daemon.sd_readers)
 306 # define SLAP_SOCK_CLR_WRITE(fd)        FD_CLR((fd), &slap_daemon.sd_writers)
 307
 308 # define SLAP_ADD_SOCK(s, l) do { \
 309         SLAP_ADDTEST((s)); \
 310         FD_SET((s), &slap_daemon.sd_actives); \
 311         FD_SET((s), &slap_daemon.sd_readers); \
 312 } while(0)
 313
 314 # define SLAP_DEL_SOCK(s) do { \
 315         FD_CLR((s), &slap_daemon.sd_actives); \
 316         FD_CLR((s), &slap_daemon.sd_readers); \
 317         FD_CLR((s), &slap_daemon.sd_writers); \
 318 } while(0)
 319
 320 # define SLAP_EVENT_IS_READ(fd)         FD_ISSET((fd), &readfds)
 321 # define SLAP_EVENT_IS_WRITE(fd)        FD_ISSET((fd), &writefds)
 322
 323 # define SLAP_EVENT_CLR_READ(fd)        FD_CLR((fd), &readfds)
 324 # define SLAP_EVENT_CLR_WRITE(fd)       FD_CLR((fd), &writefds)
 325
 326 # define SLAP_EVENT_WAIT(tvp) \
 327         select( SLAP_EVENT_MAX, &readfds, \
 328                 nwriters > 0 ? &writefds : NULL, NULL, (tvp) )
 329 #endif
 330
 331 #ifdef HAVE_SLP
 332 /*
 333  * SLP related functions
 334  */
 335 #include <slp.h>
 336
 337 #define LDAP_SRVTYPE_PREFIX "service:ldap://"
 338 #define LDAPS_SRVTYPE_PREFIX "service:ldaps://"
 339 static char** slapd_srvurls = NULL;
 340 static SLPHandle slapd_hslp = 0;
 341 int slapd_register_slp = 0;
 342 const char *slapd_slp_attrs = NULL;
 343
 344 static SLPError slapd_slp_cookie;
 345
 346 void slapd_slp_init( const char* urls ) {
 347         int i;
 348         SLPError err;
 349
 350         slapd_srvurls = ldap_str2charray( urls, " " );
 351
 352         if( slapd_srvurls == NULL ) return;
 353
 354         /* find and expand INADDR_ANY URLs */
 355         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 356                 if( strcmp( slapd_srvurls[i], "ldap:///" ) == 0) {
 357                         char *host = ldap_pvt_get_fqdn( NULL );
 358                         if ( host != NULL ) {
 359                                 slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 360                                         strlen( host ) +
 361                                         sizeof( LDAP_SRVTYPE_PREFIX ) );
 362                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 363                                         LDAP_SRVTYPE_PREFIX ), host );
 364
 365                                 ch_free( host );
 366                         }
 367
 368                 } else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0) {
 369                         char *host = ldap_pvt_get_fqdn( NULL );
 370                         if ( host != NULL ) {
 371                                 slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i],
 372                                         strlen( host ) +
 373                                         sizeof( LDAPS_SRVTYPE_PREFIX ) );
 374                                 strcpy( lutil_strcopy(slapd_srvurls[i],
 375                                         LDAPS_SRVTYPE_PREFIX ), host );
 376
 377                                 ch_free( host );
 378                         }
 379                 }
 380         }
 381
 382         /* open the SLP handle */
 383         err = SLPOpen( "en", 0, &slapd_hslp );
 384
 385         if (err != SLP_OK) {
 386                 Debug( LDAP_DEBUG_CONNS, "daemon: SLPOpen() failed with %ld\n",
 387                         (long)err, 0, 0 );
 388         }
 389 }
 390
 391 void slapd_slp_deinit() {
 392         if( slapd_srvurls == NULL ) return;
 393
 394         ldap_charray_free( slapd_srvurls );
 395         slapd_srvurls = NULL;
 396
 397         /* close the SLP handle */
 398         SLPClose( slapd_hslp );
 399 }
 400
 401 void slapd_slp_regreport(
 402         SLPHandle hslp,
 403         SLPError errcode,
 404         void* cookie )
 405 {
 406         /* return the error code in the cookie */
 407         *(SLPError*)cookie = errcode;
 408 }
 409
 410 void slapd_slp_reg() {
 411         int i;
 412         SLPError err;
 413
 414         if( slapd_srvurls == NULL ) return;
 415
 416         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 417                 if( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX,
 418                                 sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 ||
 419                     strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX,
 420                                 sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 )
 421                 {
 422                         err = SLPReg( slapd_hslp,
 423                                 slapd_srvurls[i],
 424                                 SLP_LIFETIME_MAXIMUM,
 425                                 "ldap",
 426                                         (slapd_slp_attrs) ? slapd_slp_attrs : "",
 427                                         SLP_TRUE,
 428                                 slapd_slp_regreport,
 429                                         &slapd_slp_cookie );
 430
 431                         if (err != SLP_OK || slapd_slp_cookie != SLP_OK) {
 432                                 Debug( LDAP_DEBUG_CONNS,
 433                                         "daemon: SLPReg(%s) failed with %ld, cookie = %ld\n",
 434                                         slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 435                         }
 436                 }
 437         }
 438 }
 439
 440 void slapd_slp_dereg() {
 441         int i;
 442         SLPError err;
 443
 444         if( slapd_srvurls == NULL ) return;
 445
 446         for( i=0; slapd_srvurls[i] != NULL; i++ ) {
 447                 err = SLPDereg( slapd_hslp,
 448                         slapd_srvurls[i],
 449                         slapd_slp_regreport,
 450                                 &slapd_slp_cookie );
 451
 452                 if (err != SLP_OK || slapd_slp_cookie != SLP_OK) {
 453                         Debug( LDAP_DEBUG_CONNS,
 454                                 "daemon: SLPDereg(%s) failed with %ld, cookie = %ld\n",
 455                                 slapd_srvurls[i], (long)err, (long)slapd_slp_cookie );
 456                 }
 457         }
 458 }
 459 #endif /* HAVE_SLP */
 460
 461 /*
 462  * Add a descriptor to daemon control
 463  *
 464  * If isactive, the descriptor is a live server session and is subject
 465  * to idletimeout control. Otherwise, the descriptor is a passive
 466  * listener or an outbound client session, and not subject to
 467  * idletimeout. The underlying event handler may record the Listener
 468  * argument to differentiate Listener's from real sessions.
 469  */
 470 static void slapd_add(ber_socket_t s, int isactive, Listener *sl) {
 471         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 472
 473         assert( SLAP_SOCK_NOT_ACTIVE(s) );
 474
 475         if ( isactive ) slap_daemon.sd_nactives++;
 476
 477         SLAP_ADD_SOCK(s, sl);
 478
 479         Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr\n",
 480                 (long) s, 0, 0 );
 481
 482         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 483
 484 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 485         WAKE_LISTENER(1);
 486 #endif
 487 }
 488
 489 void slapd_sd_lock()
 490 {
 491         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 492 }
 493
 494 void slapd_sd_unlock()
 495 {
 496         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 497 }
 498
 499 /*
 500  * Remove the descriptor from daemon control
 501  */
 502 void slapd_remove(
 503         ber_socket_t s,
 504         int wasactive,
 505         int wake,
 506         int locked )
 507 {
 508         int waswriter;
 509         int wasreader;
 510
 511         if ( !locked )
 512                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 513
 514         assert( SLAP_SOCK_IS_ACTIVE( s ));
 515
 516         if ( wasactive ) slap_daemon.sd_nactives--;
 517
 518         waswriter = SLAP_SOCK_IS_WRITE(s);
 519         wasreader = SLAP_SOCK_IS_READ(s);
 520
 521         Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n",
 522                 (long) s,
 523                 wasreader ? "r" : "",
 524                 waswriter ? "w" : "" );
 525
 526         if ( waswriter ) slap_daemon.sd_nwriters--;
 527
 528         SLAP_DEL_SOCK(s);
 529
 530         tcp_close(s);
 531
 532         /* If we ran out of file descriptors, we dropped a listener from
 533          * the select() loop. Now that we're removing a session from our
 534          * control, we can try to resume a dropped listener to use.
 535          */
 536         if ( emfile ) {
 537                 int i;
 538                 for ( i = 0; slap_listeners[i] != NULL; i++ ) {
 539                         Listener *lr = slap_listeners[i];
 540
 541                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
 542                         if ( lr->sl_sd == s ) continue;
 543                         if ( lr->sl_mute ) {
 544                                 lr->sl_mute = 0;
 545                                 emfile--;
 546                                 break;
 547                         }
 548                 }
 549                 /* Walked the entire list without enabling anything; emfile
 550                  * counter is stale. Reset it.
 551                  */
 552                 if ( slap_listeners[i] == NULL ) emfile = 0;
 553         }
 554         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 555         WAKE_LISTENER(wake || slapd_gentle_shutdown == 2);
 556 }
 557
 558 void slapd_clr_write(ber_socket_t s, int wake) {
 559         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 560
 561         assert( SLAP_SOCK_IS_ACTIVE( s ));
 562
 563         if ( SLAP_SOCK_IS_WRITE( s )) {
 564                 SLAP_SOCK_CLR_WRITE( s );
 565                 slap_daemon.sd_nwriters--;
 566         }
 567
 568         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 569         WAKE_LISTENER(wake);
 570 }
 571
 572 void slapd_set_write(ber_socket_t s, int wake) {
 573         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 574
 575         assert( SLAP_SOCK_IS_ACTIVE( s ));
 576
 577         if ( !SLAP_SOCK_IS_WRITE( s )) {
 578                 SLAP_SOCK_SET_WRITE( s );
 579                 slap_daemon.sd_nwriters++;
 580         }
 581
 582         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 583         WAKE_LISTENER(wake);
 584 }
 585
 586 int slapd_clr_read(ber_socket_t s, int wake) {
 587         int rc = 1;
 588         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 589
 590         if ( SLAP_SOCK_IS_ACTIVE( s )) {
 591                 SLAP_SOCK_CLR_READ( s );
 592                 rc = 0;
 593         }
 594         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 595         if ( !rc )
 596                 WAKE_LISTENER(wake);
 597         return rc;
 598 }
 599
 600 void slapd_set_read(ber_socket_t s, int wake) {
 601         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
 602
 603         assert( SLAP_SOCK_IS_ACTIVE( s ));
 604         if (!SLAP_SOCK_IS_READ( s )) SLAP_SOCK_SET_READ( s );
 605
 606         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
 607         WAKE_LISTENER(wake);
 608 }
 609
 610 static void slapd_close(ber_socket_t s) {
 611         Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n",
 612                 (long) s, 0, 0 );
 613         tcp_close(s);
 614 }
 615
 616 static void slap_free_listener_addresses(struct sockaddr **sal) {
 617         struct sockaddr **sap;
 618         if (sal == NULL) return;
 619         for (sap = sal; *sap != NULL; sap++) ch_free(*sap);
 620         ch_free(sal);
 621 }
 622
 623 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 624 static int get_url_perms(
 625         char    **exts,
 626         mode_t  *perms,
 627         int     *crit )
 628 {
 629         int     i;
 630
 631         assert( exts != NULL );
 632         assert( perms != NULL );
 633         assert( crit != NULL );
 634
 635         *crit = 0;
 636         for ( i = 0; exts[ i ]; i++ ) {
 637                 char    *type = exts[ i ];
 638                 int     c = 0;
 639
 640                 if ( type[ 0 ] == '!' ) {
 641                         c = 1;
 642                         type++;
 643                 }
 644
 645                 if ( strncasecmp( type, LDAPI_MOD_URLEXT "=",
 646                         sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 )
 647                 {
 648                         char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 );
 649                         mode_t p = 0;
 650                         int j;
 651
 652                         switch (strlen(value)) {
 653                         case 4:
 654                                 /* skip leading '0' */
 655                                 if ( value[ 0 ] != '0' ) return LDAP_OTHER;
 656                                 value++;
 657
 658                         case 3:
 659                                 for ( j = 0; j < 3; j++) {
 660                                         int     v;
 661
 662                                         v = value[ j ] - '0';
 663
 664                                         if ( v < 0 || v > 7 ) return LDAP_OTHER;
 665
 666                                         p |= v << 3*(2-j);
 667                                 }
 668                                 break;
 669
 670                         case 10:
 671                                 for ( j = 1; j < 10; j++ ) {
 672                                         static mode_t   m[] = { 0,
 673                                                 S_IRUSR, S_IWUSR, S_IXUSR,
 674                                                 S_IRGRP, S_IWGRP, S_IXGRP,
 675                                                 S_IROTH, S_IWOTH, S_IXOTH
 676                                         };
 677                                         static char     c[] = "-rwxrwxrwx";
 678
 679                                         if ( value[ j ] == c[ j ] ) {
 680                                                 p |= m[ j ];
 681
 682                                         } else if ( value[ j ] != '-' ) {
 683                                                 return LDAP_OTHER;
 684                                         }
 685                                 }
 686                                 break;
 687
 688                         default:
 689                                 return LDAP_OTHER;
 690                         }
 691
 692                         *crit = c;
 693                         *perms = p;
 694
 695                         return LDAP_SUCCESS;
 696                 }
 697         }
 698
 699         return LDAP_OTHER;
 700 }
 701 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 702
 703 /* port = 0 indicates AF_LOCAL */
 704 static int slap_get_listener_addresses(
 705         const char *host,
 706         unsigned short port,
 707         struct sockaddr ***sal)
 708 {
 709         struct sockaddr **sap;
 710
 711 #ifdef LDAP_PF_LOCAL
 712         if ( port == 0 ) {
 713                 *sal = ch_malloc(2 * sizeof(void *));
 714                 if (*sal == NULL) return -1;
 715
 716                 sap = *sal;
 717                 *sap = ch_malloc(sizeof(struct sockaddr_un));
 718                 if (*sap == NULL) goto errexit;
 719                 sap[1] = NULL;
 720
 721                 if ( strlen(host) >
 722                         (sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) )
 723                 {
 724                         Debug( LDAP_DEBUG_ANY,
 725                                 "daemon: domain socket path (%s) too long in URL",
 726                                 host, 0, 0);
 727                         goto errexit;
 728                 }
 729
 730                 (void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) );
 731                 (*sap)->sa_family = AF_LOCAL;
 732                 strcpy( ((struct sockaddr_un *)*sap)->sun_path, host );
 733         } else
 734 #endif
 735         {
 736 #ifdef HAVE_GETADDRINFO
 737                 struct addrinfo hints, *res, *sai;
 738                 int n, err;
 739                 char serv[7];
 740
 741                 memset( &hints, '\0', sizeof(hints) );
 742                 hints.ai_flags = AI_PASSIVE;
 743                 hints.ai_socktype = SOCK_STREAM;
 744                 hints.ai_family = slap_inet4or6;
 745                 snprintf(serv, sizeof serv, "%d", port);
 746
 747                 if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
 748                         Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n",
 749                                 AC_GAI_STRERROR(err), 0, 0);
 750                         return -1;
 751                 }
 752
 753                 sai = res;
 754                 for (n=2; (sai = sai->ai_next) != NULL; n++) {
 755                         /* EMPTY */ ;
 756                 }
 757                 *sal = ch_calloc(n, sizeof(void *));
 758                 if (*sal == NULL) return -1;
 759
 760                 sap = *sal;
 761                 *sap = NULL;
 762
 763                 for ( sai=res; sai; sai=sai->ai_next ) {
 764                         if( sai->ai_addr == NULL ) {
 765                                 Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: "
 766                                         "getaddrinfo ai_addr is NULL?\n", 0, 0, 0 );
 767                                 freeaddrinfo(res);
 768                                 goto errexit;
 769                         }
 770
 771                         switch (sai->ai_family) {
 772 #  ifdef LDAP_PF_INET6
 773                         case AF_INET6:
 774                                 *sap = ch_malloc(sizeof(struct sockaddr_in6));
 775                                 if (*sap == NULL) {
 776                                         freeaddrinfo(res);
 777                                         goto errexit;
 778                                 }
 779                                 *(struct sockaddr_in6 *)*sap =
 780                                         *((struct sockaddr_in6 *)sai->ai_addr);
 781                                 break;
 782 #  endif
 783                         case AF_INET:
 784                                 *sap = ch_malloc(sizeof(struct sockaddr_in));
 785                                 if (*sap == NULL) {
 786                                         freeaddrinfo(res);
 787                                         goto errexit;
 788                                 }
 789                                 *(struct sockaddr_in *)*sap =
 790                                         *((struct sockaddr_in *)sai->ai_addr);
 791                                 break;
 792                         default:
 793                                 *sap = NULL;
 794                                 break;
 795                         }
 796
 797                         if (*sap != NULL) {
 798                                 (*sap)->sa_family = sai->ai_family;
 799                                 sap++;
 800                                 *sap = NULL;
 801                         }
 802                 }
 803
 804                 freeaddrinfo(res);
 805
 806 #else
 807                 int i, n = 1;
 808                 struct in_addr in;
 809                 struct hostent *he = NULL;
 810
 811                 if ( host == NULL ) {
 812                         in.s_addr = htonl(INADDR_ANY);
 813
 814                 } else if ( !inet_aton( host, &in ) ) {
 815                         he = gethostbyname( host );
 816                         if( he == NULL ) {
 817                                 Debug( LDAP_DEBUG_ANY,
 818                                         "daemon: invalid host %s", host, 0, 0);
 819                                 return -1;
 820                         }
 821                         for (n = 0; he->h_addr_list[n]; n++) /* empty */;
 822                 }
 823
 824                 *sal = ch_malloc((n+1) * sizeof(void *));
 825                 if (*sal == NULL) return -1;
 826
 827                 sap = *sal;
 828                 for ( i = 0; i<n; i++ ) {
 829                         sap[i] = ch_malloc(sizeof(struct sockaddr_in));
 830                         if (*sap == NULL) goto errexit;
 831
 832                         (void)memset( (void *)sap[i], '\0', sizeof(struct sockaddr_in) );
 833                         sap[i]->sa_family = AF_INET;
 834                         ((struct sockaddr_in *)sap[i])->sin_port = htons(port);
 835                         AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr,
 836                                 he ? (struct in_addr *)he->h_addr_list[i] : &in,
 837                                 sizeof(struct in_addr) );
 838                 }
 839                 sap[i] = NULL;
 840 #endif
 841         }
 842
 843         return 0;
 844
 845 errexit:
 846         slap_free_listener_addresses(*sal);
 847         return -1;
 848 }
 849
 850 static int slap_open_listener(
 851         const char* url,
 852         int *listeners,
 853         int *cur
 854         )
 855 {
 856         int     num, tmp, rc;
 857         Listener l;
 858         Listener *li;
 859         LDAPURLDesc *lud;
 860         unsigned short port;
 861         int err, addrlen = 0;
 862         struct sockaddr **sal, **psal;
 863         int socktype = SOCK_STREAM;     /* default to COTS */
 864
 865 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 866         /*
 867          * use safe defaults
 868          */
 869         int     crit = 1;
 870 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 871
 872         rc = ldap_url_parse( url, &lud );
 873
 874         if( rc != LDAP_URL_SUCCESS ) {
 875                 Debug( LDAP_DEBUG_ANY,
 876                         "daemon: listen URL \"%s\" parse error=%d\n",
 877                         url, rc, 0 );
 878                 return rc;
 879         }
 880
 881         l.sl_url.bv_val = NULL;
 882         l.sl_mute = 0;
 883 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 884         l.sl_busy = 0;
 885 #endif
 886
 887 #ifndef HAVE_TLS
 888         if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) {
 889                 Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n",
 890                         url, 0, 0 );
 891                 ldap_free_urldesc( lud );
 892                 return -1;
 893         }
 894
 895         if(! lud->lud_port ) lud->lud_port = LDAP_PORT;
 896
 897 #else
 898         l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme );
 899
 900         if(! lud->lud_port ) {
 901                 lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT;
 902         }
 903 #endif
 904
 905         port = (unsigned short) lud->lud_port;
 906
 907         tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme);
 908         if ( tmp == LDAP_PROTO_IPC ) {
 909 #ifdef LDAP_PF_LOCAL
 910                 if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) {
 911                         err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal);
 912                 } else {
 913                         err = slap_get_listener_addresses(lud->lud_host, 0, &sal);
 914                 }
 915 #else
 916
 917                 Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s",
 918                         url, 0, 0);
 919                 ldap_free_urldesc( lud );
 920                 return -1;
 921 #endif
 922         } else {
 923                 if( lud->lud_host == NULL || lud->lud_host[0] == '\0'
 924                         || strcmp(lud->lud_host, "*") == 0 )
 925                 {
 926                         err = slap_get_listener_addresses(NULL, port, &sal);
 927                 } else {
 928                         err = slap_get_listener_addresses(lud->lud_host, port, &sal);
 929                 }
 930         }
 931
 932 #ifdef LDAP_CONNECTIONLESS
 933         l.sl_is_udp = ( tmp == LDAP_PROTO_UDP );
 934 #endif
 935
 936 #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD)
 937         if ( lud->lud_exts ) {
 938                 err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit );
 939         } else {
 940                 l.sl_perms = S_IRWXU | S_IRWXO;
 941         }
 942 #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */
 943
 944         ldap_free_urldesc( lud );
 945         if ( err ) return -1;
 946
 947         /* If we got more than one address returned, we need to make space
 948          * for it in the slap_listeners array.
 949          */
 950         for ( num=0; sal[num]; num++ ) /* empty */;
 951         if ( num > 1 ) {
 952                 *listeners += num-1;
 953                 slap_listeners = ch_realloc( slap_listeners,
 954                         (*listeners + 1) * sizeof(Listener *) );
 955         }
 956
 957         psal = sal;
 958         while ( *sal != NULL ) {
 959                 char *af;
 960                 switch( (*sal)->sa_family ) {
 961                 case AF_INET:
 962                         af = "IPv4";
 963                         break;
 964 #ifdef LDAP_PF_INET6
 965                 case AF_INET6:
 966                         af = "IPv6";
 967                         break;
 968 #endif
 969 #ifdef LDAP_PF_LOCAL
 970                 case AF_LOCAL:
 971                         af = "Local";
 972                         break;
 973 #endif
 974                 default:
 975                         sal++;
 976                         continue;
 977                 }
 978
 979 #ifdef LDAP_CONNECTIONLESS
 980                 if( l.sl_is_udp ) socktype = SOCK_DGRAM;
 981 #endif
 982
 983                 l.sl_sd = socket( (*sal)->sa_family, socktype, 0);
 984                 if ( l.sl_sd == AC_SOCKET_INVALID ) {
 985                         int err = sock_errno();
 986                         Debug( LDAP_DEBUG_ANY,
 987                                 "daemon: %s socket() failed errno=%d (%s)\n",
 988                                 af, err, sock_errstr(err) );
 989                         sal++;
 990                         continue;
 991                 }
 992
 993 #ifndef HAVE_WINSOCK
 994                 if ( l.sl_sd >= dtblsize ) {
 995                         Debug( LDAP_DEBUG_ANY,
 996                                 "daemon: listener descriptor %ld is too great %ld\n",
 997                                 (long) l.sl_sd, (long) dtblsize, 0 );
 998                         tcp_close( l.sl_sd );
 999                         sal++;
1000                         continue;
1001                 }
1002 #endif
1003
1004 #ifdef LDAP_PF_LOCAL
1005                 if ( (*sal)->sa_family == AF_LOCAL ) {
1006                         unlink( ((struct sockaddr_un *)*sal)->sun_path );
1007                 } else
1008 #endif
1009                 {
1010 #ifdef SO_REUSEADDR
1011                         /* enable address reuse */
1012                         tmp = 1;
1013                         rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR,
1014                                 (char *) &tmp, sizeof(tmp) );
1015                         if ( rc == AC_SOCKET_ERROR ) {
1016                                 int err = sock_errno();
1017                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1018                                         "setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n",
1019                                         (long) l.sl_sd, err, sock_errstr(err) );
1020                         }
1021 #endif
1022                 }
1023
1024                 switch( (*sal)->sa_family ) {
1025                 case AF_INET:
1026                         addrlen = sizeof(struct sockaddr_in);
1027                         break;
1028 #ifdef LDAP_PF_INET6
1029                 case AF_INET6:
1030 #ifdef IPV6_V6ONLY
1031                         /* Try to use IPv6 sockets for IPv6 only */
1032                         tmp = 1;
1033                         rc = setsockopt( l.sl_sd, IPPROTO_IPV6, IPV6_V6ONLY,
1034                                 (char *) &tmp, sizeof(tmp) );
1035                         if ( rc == AC_SOCKET_ERROR ) {
1036                                 int err = sock_errno();
1037                                 Debug( LDAP_DEBUG_ANY, "slapd(%ld): "
1038                                         "setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n",
1039                                         (long) l.sl_sd, err, sock_errstr(err) );
1040                         }
1041 #endif
1042                         addrlen = sizeof(struct sockaddr_in6);
1043                         break;
1044 #endif
1045
1046 #ifdef LDAP_PF_LOCAL
1047                 case AF_LOCAL:
1048 #ifdef LOCAL_CREDS
1049                 {
1050                         int one = 1;
1051                         setsockopt(l.sl_sd, 0, LOCAL_CREDS, &one, sizeof one);
1052                 }
1053 #endif
1054                 addrlen = sizeof(struct sockaddr_un);
1055                 break;
1056 #endif
1057                 }
1058
1059                 if (bind(l.sl_sd, *sal, addrlen)) {
1060                         err = sock_errno();
1061                         Debug( LDAP_DEBUG_ANY,
1062                                 "daemon: bind(%ld) failed errno=%d (%s)\n",
1063                                 (long) l.sl_sd, err, sock_errstr(err) );
1064                         tcp_close( l.sl_sd );
1065                         sal++;
1066                         continue;
1067                 }
1068
1069                 switch ( (*sal)->sa_family ) {
1070 #ifdef LDAP_PF_LOCAL
1071                 case AF_LOCAL: {
1072                         char *addr = ((struct sockaddr_un *)*sal)->sun_path;
1073                         l.sl_name.bv_len = strlen(addr) + sizeof("PATH=") - 1;
1074                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 );
1075                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1,
1076                                 "PATH=%s", addr );
1077                 } break;
1078 #endif /* LDAP_PF_LOCAL */
1079
1080                 case AF_INET: {
1081                         char *s;
1082 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1083                         char addr[INET_ADDRSTRLEN];
1084                         inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr,
1085                                 addr, sizeof(addr) );
1086                         s = addr;
1087 #else
1088                         s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr );
1089 #endif
1090                         port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port );
1091                         l.sl_name.bv_val =
1092                                 ber_memalloc( sizeof("IP=255.255.255.255:65535") );
1093                         snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"),
1094                                 "IP=%s:%d",
1095                                  s != NULL ? s : SLAP_STRING_UNKNOWN, port );
1096                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1097                 } break;
1098
1099 #ifdef LDAP_PF_INET6
1100                 case AF_INET6: {
1101                         char addr[INET6_ADDRSTRLEN];
1102                         inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr,
1103                                 addr, sizeof addr);
1104                         port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port );
1105                         l.sl_name.bv_len = strlen(addr) + sizeof("IP= 65535");
1106                         l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len );
1107                         snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=%s %d",
1108                                 addr, port );
1109                         l.sl_name.bv_len = strlen( l.sl_name.bv_val );
1110                 } break;
1111 #endif /* LDAP_PF_INET6 */
1112
1113                 default:
1114                         Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n",
1115                                 (int) (*sal)->sa_family, 0, 0 );
1116                         break;
1117                 }
1118
1119                 AC_MEMCPY(&l.sl_sa, *sal, addrlen);
1120                 ber_str2bv( url, 0, 1, &l.sl_url);
1121                 li = ch_malloc( sizeof( Listener ) );
1122                 *li = l;
1123                 slap_listeners[*cur] = li;
1124                 (*cur)++;
1125                 sal++;
1126         }
1127
1128         slap_free_listener_addresses(psal);
1129
1130         if ( l.sl_url.bv_val == NULL ) {
1131                 Debug( LDAP_DEBUG_TRACE,
1132                         "slap_open_listener: failed on %s\n", url, 0, 0 );
1133                 return -1;
1134         }
1135
1136         Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n",
1137                 l.sl_url.bv_val, 0, 0 );
1138         return 0;
1139 }
1140
1141 static int sockinit(void);
1142 static int sockdestroy(void);
1143
1144 int slapd_daemon_init( const char *urls )
1145 {
1146         int i, j, n, rc;
1147         char **u;
1148
1149         Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n",
1150                 urls ? urls : "<null>", 0, 0 );
1151
1152         ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
1153 #ifdef HAVE_TCPD
1154         ldap_pvt_thread_mutex_init( &slap_daemon.tcpd_mutex );
1155 #endif
1156
1157         if( (rc = sockinit()) != 0 ) return rc;
1158
1159 #ifdef HAVE_SYSCONF
1160         dtblsize = sysconf( _SC_OPEN_MAX );
1161 #elif HAVE_GETDTABLESIZE
1162         dtblsize = getdtablesize();
1163 #else
1164         dtblsize = FD_SETSIZE;
1165 #endif
1166
1167         /* open a pipe (or something equivalent connected to itself).
1168          * we write a byte on this fd whenever we catch a signal. The main
1169          * loop will be select'ing on this socket, and will wake up when
1170          * this byte arrives.
1171          */
1172         if( (rc = lutil_pair( wake_sds )) < 0 ) {
1173                 Debug( LDAP_DEBUG_ANY,
1174                         "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 );
1175                 return rc;
1176         }
1177
1178         SLAP_SOCK_SET_INIT;
1179
1180         if( urls == NULL ) urls = "ldap:///";
1181
1182         u = ldap_str2charray( urls, " " );
1183
1184         if( u == NULL || u[0] == NULL ) {
1185                 Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n",
1186                         urls, 0, 0 );
1187                 if ( u )
1188                         ldap_charray_free( u );
1189                 return -1;
1190         }
1191
1192         for( i=0; u[i] != NULL; i++ ) {
1193                 Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n",
1194                         u[i], 0, 0 );
1195         }
1196
1197         if( i == 0 ) {
1198                 Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n",
1199                         urls, 0, 0 );
1200                 ldap_charray_free( u );
1201                 return -1;
1202         }
1203
1204         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n",
1205                 i, 0, 0 );
1206         slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) );
1207
1208         for(n = 0, j = 0; u[n]; n++ ) {
1209                 if ( slap_open_listener( u[n], &i, &j ) ) {
1210                         ldap_charray_free( u );
1211                         return -1;
1212                 }
1213         }
1214         slap_listeners[j] = NULL;
1215
1216         Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n",
1217                 i, 0, 0 );
1218
1219
1220 #ifdef HAVE_SLP
1221         if( slapd_register_slp ) {
1222                 slapd_slp_init( urls );
1223                 slapd_slp_reg();
1224         }
1225 #endif
1226
1227         ldap_charray_free( u );
1228
1229         return !i;
1230 }
1231
1232
1233 int
1234 slapd_daemon_destroy(void)
1235 {
1236         connections_destroy();
1237         tcp_close( wake_sds[1] );
1238         tcp_close( wake_sds[0] );
1239         sockdestroy();
1240
1241 #ifdef HAVE_SLP
1242         if( slapd_register_slp ) {
1243                 slapd_slp_dereg();
1244                 slapd_slp_deinit();
1245         }
1246 #endif
1247
1248 #ifdef HAVE_TCPD
1249         ldap_pvt_thread_mutex_destroy( &slap_daemon.tcpd_mutex );
1250 #endif
1251
1252         ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_mutex );
1253         return 0;
1254 }
1255
1256
1257 static void
1258 close_listeners(
1259         int remove )
1260 {
1261         int l;
1262
1263         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1264                 Listener *lr = slap_listeners[l];
1265
1266                 if ( lr->sl_sd != AC_SOCKET_INVALID ) {
1267                         if ( remove ) slapd_remove( lr->sl_sd, 0, 0, 0 );
1268
1269 #ifdef LDAP_PF_LOCAL
1270                         if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) {
1271                                 unlink( lr->sl_sa.sa_un_addr.sun_path );
1272                         }
1273 #endif /* LDAP_PF_LOCAL */
1274
1275                         slapd_close( lr->sl_sd );
1276                 }
1277
1278                 if ( lr->sl_url.bv_val ) {
1279                         ber_memfree( lr->sl_url.bv_val );
1280                 }
1281
1282                 if ( lr->sl_name.bv_val ) {
1283                         ber_memfree( lr->sl_name.bv_val );
1284                 }
1285
1286                 free( lr );
1287                 slap_listeners[l] = NULL;
1288         }
1289 }
1290
1291 static int
1292 slap_listener(
1293         Listener *sl )
1294 {
1295         Sockaddr                from;
1296
1297         ber_socket_t s;
1298         socklen_t len = sizeof(from);
1299         long id;
1300         slap_ssf_t ssf = 0;
1301         struct berval authid = BER_BVNULL;
1302 #ifdef SLAPD_RLOOKUPS
1303         char hbuf[NI_MAXHOST];
1304 #endif
1305
1306         char    *dnsname = NULL;
1307         char    *peeraddr = NULL;
1308 #ifdef LDAP_PF_LOCAL
1309         char peername[MAXPATHLEN + sizeof("PATH=")];
1310 #elif defined(LDAP_PF_INET6)
1311         char peername[sizeof("IP=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 65535")];
1312 #else
1313         char peername[sizeof("IP=255.255.255.255:65336")];
1314 #endif /* LDAP_PF_LOCAL */
1315
1316         peername[0] = '\0';
1317
1318 #ifdef LDAP_CONNECTIONLESS
1319         if ( sl->sl_is_udp ) return 1;
1320 #endif
1321
1322 #  ifdef LDAP_PF_LOCAL
1323         /* FIXME: apparently accept doesn't fill
1324          * the sun_path sun_path member */
1325         from.sa_un_addr.sun_path[0] = '\0';
1326 #  endif /* LDAP_PF_LOCAL */
1327
1328         s = accept( sl->sl_sd, (struct sockaddr *) &from, &len );
1329
1330 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1331         /* Resume the listener FD to allow concurrent-processing of
1332          * additional incoming connections.
1333          */
1334         sl->sl_busy = 0;
1335         WAKE_LISTENER(1);
1336 #endif
1337
1338         if ( s == AC_SOCKET_INVALID ) {
1339                 int err = sock_errno();
1340
1341                 if(
1342 #ifdef EMFILE
1343                     err == EMFILE ||
1344 #endif
1345 #ifdef ENFILE
1346                     err == ENFILE ||
1347 #endif
1348                     0 )
1349                 {
1350                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1351                         emfile++;
1352                         /* Stop listening until an existing session closes */
1353                         sl->sl_mute = 1;
1354                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1355                 }
1356
1357                 Debug( LDAP_DEBUG_ANY,
1358                         "daemon: accept(%ld) failed errno=%d (%s)\n",
1359                         (long) sl->sl_sd, err, sock_errstr(err) );
1360                 ldap_pvt_thread_yield();
1361                 return 0;
1362         }
1363
1364 #ifndef HAVE_WINSOCK
1365         /* make sure descriptor number isn't too great */
1366         if ( s >= dtblsize ) {
1367                 Debug( LDAP_DEBUG_ANY,
1368                         "daemon: %ld beyond descriptor table size %ld\n",
1369                         (long) s, (long) dtblsize, 0 );
1370
1371                 slapd_close(s);
1372                 ldap_pvt_thread_yield();
1373                 return 0;
1374         }
1375 #endif
1376
1377 #ifdef LDAP_DEBUG
1378         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1379         /* newly accepted stream should not be in any of the FD SETS */
1380         assert( SLAP_SOCK_NOT_ACTIVE( s ));
1381         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1382 #endif
1383
1384 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
1385 #ifdef LDAP_PF_LOCAL
1386         /* for IPv4 and IPv6 sockets only */
1387         if ( from.sa_addr.sa_family != AF_LOCAL )
1388 #endif /* LDAP_PF_LOCAL */
1389         {
1390                 int rc;
1391                 int tmp;
1392 #ifdef SO_KEEPALIVE
1393                 /* enable keep alives */
1394                 tmp = 1;
1395                 rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
1396                         (char *) &tmp, sizeof(tmp) );
1397                 if ( rc == AC_SOCKET_ERROR ) {
1398                         int err = sock_errno();
1399                         Debug( LDAP_DEBUG_ANY,
1400                                 "slapd(%ld): setsockopt(SO_KEEPALIVE) failed "
1401                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1402                 }
1403 #endif
1404 #ifdef TCP_NODELAY
1405                 /* enable no delay */
1406                 tmp = 1;
1407                 rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
1408                         (char *)&tmp, sizeof(tmp) );
1409                 if ( rc == AC_SOCKET_ERROR ) {
1410                         int err = sock_errno();
1411                         Debug( LDAP_DEBUG_ANY,
1412                                 "slapd(%ld): setsockopt(TCP_NODELAY) failed "
1413                                 "errno=%d (%s)\n", (long) s, err, sock_errstr(err) );
1414                 }
1415 #endif
1416         }
1417 #endif
1418
1419         Debug( LDAP_DEBUG_CONNS,
1420                 "daemon: listen=%ld, new connection on %ld\n",
1421                 (long) sl->sl_sd, (long) s, 0 );
1422
1423         switch ( from.sa_addr.sa_family ) {
1424 #  ifdef LDAP_PF_LOCAL
1425         case AF_LOCAL:
1426                 /* FIXME: apparently accept doesn't fill
1427                  * the sun_path sun_path member */
1428                 if ( from.sa_un_addr.sun_path[0] == '\0' ) {
1429                         AC_MEMCPY( from.sa_un_addr.sun_path,
1430                                         sl->sl_sa.sa_un_addr.sun_path,
1431                                         sizeof( from.sa_un_addr.sun_path ) );
1432                 }
1433
1434                 sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path );
1435                 ssf = local_ssf;
1436                 {
1437                         uid_t uid;
1438                         gid_t gid;
1439
1440                         if( getpeereid( s, &uid, &gid ) == 0 ) {
1441                                 authid.bv_val = ch_malloc(
1442                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1443                                         "cn=peercred,cn=external,cn=auth" ) + 1 );
1444                                 authid.bv_len = sprintf( authid.bv_val,
1445                                         "gidNumber=%d+uidNumber=%d,"
1446                                         "cn=peercred,cn=external,cn=auth",
1447                                         (int) gid, (int) uid );
1448                                 assert( authid.bv_len <=
1449                                         STRLENOF( "gidNumber=4294967295+uidNumber=4294967295,"
1450                                         "cn=peercred,cn=external,cn=auth" ) );
1451                         }
1452                 }
1453                 dnsname = "local";
1454                 break;
1455 #endif /* LDAP_PF_LOCAL */
1456
1457 #  ifdef LDAP_PF_INET6
1458         case AF_INET6:
1459         if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) {
1460                 peeraddr = inet_ntoa( *((struct in_addr *)
1461                                         &from.sa_in6_addr.sin6_addr.s6_addr[12]) );
1462                 sprintf( peername, "IP=%s:%d",
1463                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1464                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1465         } else {
1466                 char addr[INET6_ADDRSTRLEN];
1467
1468                 peeraddr = (char *) inet_ntop( AF_INET6,
1469                                       &from.sa_in6_addr.sin6_addr,
1470                                       addr, sizeof addr );
1471                 sprintf( peername, "IP=%s %d",
1472                          peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1473                          (unsigned) ntohs( from.sa_in6_addr.sin6_port ) );
1474         }
1475         break;
1476 #  endif /* LDAP_PF_INET6 */
1477
1478         case AF_INET:
1479         peeraddr = inet_ntoa( from.sa_in_addr.sin_addr );
1480         sprintf( peername, "IP=%s:%d",
1481                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1482                 (unsigned) ntohs( from.sa_in_addr.sin_port ) );
1483                 break;
1484
1485         default:
1486                 slapd_close(s);
1487                 return 0;
1488         }
1489
1490         if ( ( from.sa_addr.sa_family == AF_INET )
1491 #ifdef LDAP_PF_INET6
1492                 || ( from.sa_addr.sa_family == AF_INET6 )
1493 #endif
1494                 )
1495         {
1496                 dnsname = NULL;
1497 #ifdef SLAPD_RLOOKUPS
1498                 if ( use_reverse_lookup ) {
1499                         char *herr;
1500                         if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf,
1501                                 sizeof(hbuf), &herr ) == 0) {
1502                                 ldap_pvt_str2lower( hbuf );
1503                                 dnsname = hbuf;
1504                         }
1505                 }
1506 #endif /* SLAPD_RLOOKUPS */
1507
1508 #ifdef HAVE_TCPD
1509                 {
1510                         int rc;
1511                         ldap_pvt_thread_mutex_lock( &slap_daemon.tcpd_mutex );
1512                         rc = hosts_ctl("slapd",
1513                                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1514                                 peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1515                                 SLAP_STRING_UNKNOWN );
1516                         ldap_pvt_thread_mutex_unlock( &slap_daemon.tcpd_mutex );
1517                         if ( !rc ) {
1518                                 /* DENY ACCESS */
1519                                 Statslog( LDAP_DEBUG_STATS,
1520                                         "fd=%ld DENIED from %s (%s)\n",
1521                                         (long) s,
1522                                         dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1523                                         peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN,
1524                                         0, 0 );
1525                                 slapd_close(s);
1526                                 return 0;
1527                         }
1528                 }
1529 #endif /* HAVE_TCPD */
1530         }
1531
1532         id = connection_init(s, sl,
1533                 dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN,
1534                 peername,
1535 #ifdef HAVE_TLS
1536                 sl->sl_is_tls ? CONN_IS_TLS : 0,
1537 #else
1538                 0,
1539 #endif
1540                 ssf,
1541                 authid.bv_val ? &authid : NULL );
1542
1543         if( authid.bv_val ) ch_free(authid.bv_val);
1544
1545         if( id < 0 ) {
1546                 Debug( LDAP_DEBUG_ANY,
1547                         "daemon: connection_init(%ld, %s, %s) failed.\n",
1548                         (long) s, peername, sl->sl_name.bv_val );
1549                 slapd_close(s);
1550                 return 0;
1551         }
1552
1553         Statslog( LDAP_DEBUG_STATS,
1554                 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
1555                 id, (long) s, peername, sl->sl_name.bv_val,
1556                 0 );
1557
1558         return 0;
1559 }
1560
1561 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1562 static void*
1563 slap_listener_thread(
1564         void* ctx,
1565         void* ptr )
1566 {
1567         int rc;
1568
1569         rc = slap_listener( (Listener*)ptr );
1570
1571         if( rc != LDAP_SUCCESS ) {
1572                 Debug( LDAP_DEBUG_ANY,
1573                         "listener_thread: failed %d", rc, 0, 0 );
1574         }
1575
1576         return (void*)NULL;
1577 }
1578
1579 static int
1580 slap_listener_activate(
1581         Listener* sl )
1582 {
1583         int rc;
1584
1585         Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n",
1586                 sl->sl_sd, sl->sl_busy ? "busy" : "", 0 );
1587
1588         sl->sl_busy++;
1589
1590         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1591                 slap_listener_thread, (void *) sl );
1592
1593         if( rc != 0 ) {
1594                 Debug( LDAP_DEBUG_ANY,
1595                         "listener_activate(%d): submit failed (%d)\n",
1596                         sl->sl_sd, rc, 0 );
1597         }
1598         return rc;
1599 }
1600 #endif
1601
1602 static void *
1603 slapd_daemon_task(
1604         void *ptr )
1605 {
1606         int l;
1607         time_t last_idle_check = 0;
1608         struct timeval idle;
1609         int ebadf = 0;
1610
1611 #define SLAPD_IDLE_CHECK_LIMIT 4
1612
1613         if ( global_idletimeout > 0 ) {
1614                 last_idle_check = slap_get_time();
1615                 /* Set the select timeout.
1616                  * Don't just truncate, preserve the fractions of
1617                  * seconds to prevent sleeping for zero time.
1618                  */
1619                 idle.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT;
1620                 idle.tv_usec = global_idletimeout - \
1621                         ( idle.tv_sec * SLAPD_IDLE_CHECK_LIMIT );
1622                 idle.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT;
1623         } else {
1624                 idle.tv_sec = 0;
1625                 idle.tv_usec = 0;
1626         }
1627
1628         slapd_add( wake_sds[0], 0, NULL );
1629
1630         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1631                 if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
1632
1633 #ifdef LDAP_CONNECTIONLESS
1634                 /* Since this is connectionless, the data port is the
1635                  * listening port. The listen() and accept() calls
1636                  * are unnecessary.
1637                  */
1638                 if ( slap_listeners[l]->sl_is_udp )
1639                         continue;
1640 #endif
1641
1642                 if ( listen( slap_listeners[l]->sl_sd, SLAPD_LISTEN_BACKLOG ) == -1 ) {
1643                         int err = sock_errno();
1644
1645 #ifdef LDAP_PF_INET6
1646                         /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and
1647                          * we are already listening to in6addr_any, then we want to ignore
1648                          * this and continue.
1649                          */
1650                         if ( err == EADDRINUSE ) {
1651                                 int i;
1652                                 struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr;
1653                                 struct sockaddr_in6 sa6;
1654
1655                                 if ( sa.sin_family == AF_INET &&
1656                                      sa.sin_addr.s_addr == htonl(INADDR_ANY) ) {
1657                                         for ( i = 0 ; i < l; i++ ) {
1658                                                 sa6 = slap_listeners[i]->sl_sa.sa_in6_addr;
1659                                                 if ( sa6.sin6_family == AF_INET6 &&
1660                                                      !memcmp( &sa6.sin6_addr, &in6addr_any,
1661                                                                 sizeof(struct in6_addr) ) )
1662                                                 {
1663                                                         break;
1664                                                 }
1665                                         }
1666
1667                                         if ( i < l ) {
1668                                                 /* We are already listening to in6addr_any */
1669                                                 Debug( LDAP_DEBUG_CONNS,
1670                                                         "daemon: Attempt to listen to 0.0.0.0 failed, "
1671                                                         "already listening on ::, assuming IPv4 included\n",
1672                                                         0, 0, 0 );
1673                                                 slapd_close( slap_listeners[l]->sl_sd );
1674                                                 slap_listeners[l]->sl_sd = AC_SOCKET_INVALID;
1675                                                 continue;
1676                                         }
1677                                 }
1678                         }
1679 #endif
1680                         Debug( LDAP_DEBUG_ANY,
1681                                 "daemon: listen(%s, 5) failed errno=%d (%s)\n",
1682                                         slap_listeners[l]->sl_url.bv_val, err,
1683                                         sock_errstr(err) );
1684                         return (void*)-1;
1685                 }
1686
1687 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1688                 /* make the listening socket non-blocking */
1689                 if ( ber_pvt_socket_set_nonblock( slap_listeners[l]->sl_sd, 1 ) < 0 ) {
1690                         Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: "
1691                                 "set nonblocking on a listening socket failed\n",
1692                                 0, 0, 0 );
1693                         slapd_shutdown = 2;
1694                         return (void*)-1;
1695                 }
1696 #endif
1697
1698                 slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l] );
1699         }
1700
1701 #ifdef HAVE_NT_SERVICE_MANAGER
1702         if ( started_event != NULL ) {
1703                 ldap_pvt_thread_cond_signal( &started_event );
1704         }
1705 #endif
1706
1707 #ifdef SLAP_SEM_LOAD_CONTROL
1708         /*
1709          * initialize count and lazyness of a semaphore
1710          */
1711         (void) ldap_lazy_sem_init(
1712                 SLAP_MAX_WORKER_THREADS + 4 /* max workers + margin */,
1713                 4 /* lazyness */ );
1714 #endif
1715
1716         /* initialization complete. Here comes the loop. */
1717
1718         while ( !slapd_shutdown ) {
1719                 ber_socket_t i;
1720                 int ns, nwriters;
1721                 int at;
1722                 ber_socket_t nfds;
1723 #if SLAP_EVENTS_ARE_INDEXED
1724                 ber_socket_t nrfds, nwfds;
1725 #endif
1726 #define SLAPD_EBADF_LIMIT 16
1727
1728                 time_t  now;
1729
1730                 SLAP_EVENT_DECL;
1731
1732                 struct timeval          tv;
1733                 struct timeval          *tvp;
1734
1735                 struct timeval          cat;
1736                 time_t                          tdelta = 1;
1737                 struct re_s*            rtask;
1738                 now = slap_get_time();
1739
1740                 if( ( global_idletimeout > 0 ) &&
1741                         difftime( last_idle_check +
1742                         global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 ) {
1743                         connections_timeout_idle( now );
1744                         last_idle_check = now;
1745                 }
1746                 tv = idle;
1747
1748 #ifdef SIGHUP
1749                 if( slapd_gentle_shutdown ) {
1750                         ber_socket_t active;
1751
1752                         if( slapd_gentle_shutdown == 1 ) {
1753                                 BackendDB *be;
1754                                 Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 );
1755                                 close_listeners( 1 );
1756                                 frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
1757                                 LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
1758                                         be->be_restrictops |= SLAP_RESTRICT_OP_WRITES;
1759                                 }
1760                                 slapd_gentle_shutdown = 2;
1761                         }
1762
1763                         ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1764                         active = slap_daemon.sd_nactives;
1765                         ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1766                         if( active == 0 ) {
1767                                 slapd_shutdown = 1;
1768                                 break;
1769                         }
1770                 }
1771 #endif
1772                 at = 0;
1773
1774                 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
1775
1776                 nwriters = slap_daemon.sd_nwriters;
1777
1778                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1779                         Listener *lr = slap_listeners[l];
1780
1781                         if ( lr->sl_sd == AC_SOCKET_INVALID ) continue;
1782
1783 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1784                         if ( lr->sl_mute || lr->sl_busy )
1785 #else
1786                         if ( lr->sl_mute )
1787 #endif
1788                         {
1789                             SLAP_SOCK_CLR_READ( lr->sl_sd );
1790                         } else {
1791                                 SLAP_SOCK_SET_READ( lr->sl_sd );
1792                         }
1793                 }
1794
1795                 SLAP_EVENT_INIT;
1796
1797                 nfds = SLAP_EVENT_MAX;
1798
1799                 if ( global_idletimeout && slap_daemon.sd_nactives ) at = 1;
1800
1801                 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
1802
1803                 if ( at
1804 #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS)
1805                         &&  ( tv.tv_sec || tv.tv_usec )
1806 #endif
1807                         )
1808                 {
1809                         tvp = &tv;
1810                 } else {
1811                         tvp = NULL;
1812                 }
1813
1814                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1815                 rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1816                 while ( rtask && cat.tv_sec && cat.tv_sec <= now ) {
1817                         if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) {
1818                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1819                         } else {
1820                                 ldap_pvt_runqueue_runtask( &slapd_rq, rtask );
1821                                 ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 );
1822                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1823                                 ldap_pvt_thread_pool_submit( &connection_pool,
1824                                         rtask->routine, (void *) rtask );
1825                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
1826                         }
1827                         rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat );
1828                 }
1829                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
1830
1831                 if ( rtask && cat.tv_sec ) {
1832                         time_t diff = difftime( cat.tv_sec, now );
1833                         if ( diff == 0 ) diff = tdelta;
1834                         if ( tvp == NULL || diff < tv.tv_sec ) {
1835                                 tv.tv_sec = diff;
1836                                 tv.tv_usec = 0;
1837                                 tvp = &tv;
1838                         }
1839                 }
1840
1841                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1842                         Listener *lr = slap_listeners[l];
1843
1844                         if ( lr->sl_sd == AC_SOCKET_INVALID ) {
1845                                 continue;
1846                         }
1847
1848                         if ( lr->sl_mute ) {
1849                                 Debug( LDAP_DEBUG_CONNS,
1850                                         "daemon: select: listen=%d muted\n",
1851                                         lr->sl_sd, 0, 0 );
1852                                 continue;
1853                         }
1854
1855 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1856                         if ( lr->sl_busy ) {
1857                                 Debug( LDAP_DEBUG_CONNS,
1858                                         "daemon: select: listen=%d busy\n",
1859                                         lr->sl_sd, 0, 0 );
1860                                 continue;
1861                         }
1862 #endif
1863
1864                         Debug( LDAP_DEBUG_CONNS,
1865                                 "daemon: select: listen=%d active_threads=%d tvp=%s\n",
1866                                 lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" );
1867                 }
1868
1869                 switch(ns = SLAP_EVENT_WAIT(tvp)) {
1870                 case -1: {      /* failure - try again */
1871                                 int err = sock_errno();
1872
1873                                 if( err != EINTR ) {
1874                                         ebadf++;
1875
1876                                         /* Don't log unless we got it twice in a row */
1877                                         if ( !( ebadf & 1 )) {
1878                                                 Debug( LDAP_DEBUG_ANY,
1879                                                         "daemon: select failed count %d err (%d): %s\n",
1880                                                         ebadf, err, sock_errstr(err) );
1881                                         }
1882                                         if ( ebadf >= SLAPD_EBADF_LIMIT )
1883                                                 slapd_shutdown = 2;
1884                                 }
1885                         }
1886                         continue;
1887
1888                 case 0:         /* timeout - let threads run */
1889                         ebadf = 0;
1890 #ifndef HAVE_YIELDING_SELECT
1891                         Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
1892                             0, 0, 0 );
1893
1894                         ldap_pvt_thread_yield();
1895 #endif
1896                         continue;
1897
1898                 default:        /* something happened - deal with it */
1899                         if( slapd_shutdown ) continue;
1900
1901                         ebadf = 0;
1902                         Debug( LDAP_DEBUG_CONNS,
1903                                 "daemon: activity on %d descriptor%s\n",
1904                                 ns, ns != 1 ? "s" : "", 0 );
1905                         /* FALL THRU */
1906                 }
1907
1908 #if SLAP_EVENTS_ARE_INDEXED
1909                 if ( SLAP_EVENT_IS_READ( wake_sds[0] )) {
1910                         char c[BUFSIZ];
1911                         SLAP_EVENT_CLR_READ( wake_sds[0] );
1912                         waking = 0;
1913                         tcp_read( wake_sds[0], c, sizeof(c) );
1914                         Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 0 );
1915                         continue;
1916                 }
1917
1918                 /* The event slot equals the descriptor number - this is
1919                  * true for Unix select and poll. We treat Windows select
1920                  * like this too, even though it's a kludge.
1921                  */
1922                 for ( l = 0; slap_listeners[l] != NULL; l++ ) {
1923                         int rc;
1924
1925                         if ( ns <= 0 ) break;
1926                         if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue;
1927 #ifdef LDAP_CONNECTIONLESS
1928                         if ( slap_listeners[l]->sl_is_udp ) continue;
1929 #endif
1930                         if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd )) continue;
1931
1932                         /* clear events */
1933                         SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd );
1934                         SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd );
1935                         ns--;
1936
1937 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1938                         rc = slap_listener_activate(slap_listeners[l]);
1939 #else
1940                         rc = slap_listener(slap_listeners[l]);
1941 #endif
1942                 }
1943
1944                 /* bypass the following tests if no descriptors left */
1945                 if ( ns <= 0 ) {
1946 #ifndef HAVE_YIELDING_SELECT
1947                         ldap_pvt_thread_yield();
1948 #endif
1949                         continue;
1950                 }
1951
1952                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
1953 #ifdef HAVE_WINSOCK
1954                 nrfds = readfds.fd_count;
1955                 nwfds = writefds.fd_count;
1956                 for ( i = 0; i < readfds.fd_count; i++ ) {
1957                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1958                                 readfds.fd_array[i], "r", 0 );
1959                 }
1960                 for ( i = 0; i < writefds.fd_count; i++ ) {
1961                         Debug( LDAP_DEBUG_CONNS, " %d%s",
1962                                 writefds.fd_array[i], "w", 0 );
1963                 }
1964
1965 #else
1966                 nrfds = 0;
1967                 nwfds = 0;
1968                 for ( i = 0; i < nfds; i++ ) {
1969                         int     r, w;
1970
1971                         r = SLAP_EVENT_IS_READ( i );
1972                         /* writefds was not initialized if nwriters was zero */
1973                         w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0;
1974                         if ( r || w ) {
1975                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
1976                                     r ? "r" : "", w ? "w" : "" );
1977                                 if ( r ) {
1978                                         nrfds++;
1979                                         ns--;
1980                                 }
1981                                 if ( w ) {
1982                                         nwfds++;
1983                                         ns--;
1984                                 }
1985                         }
1986                         if ( ns <= 0 ) break;
1987                 }
1988 #endif
1989                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
1990
1991
1992                 /* loop through the writers */
1993                 for ( i = 0; nwfds > 0; i++ ) {
1994                         ber_socket_t wd;
1995 #ifdef HAVE_WINSOCK
1996                         wd = writefds.fd_array[i];
1997 #else
1998                         if( ! SLAP_EVENT_IS_WRITE( i ) ) continue;
1999                         wd = i;
2000 #endif
2001
2002                         SLAP_EVENT_CLR_WRITE( wd );
2003                         nwfds--;
2004
2005                         Debug( LDAP_DEBUG_CONNS,
2006                                 "daemon: write active on %d\n",
2007                                 wd, 0, 0 );
2008
2009                         /*
2010                          * NOTE: it is possible that the connection was closed
2011                          * and that the stream is now inactive.
2012                          * connection_write() must validate the stream is still
2013                          * active.
2014                          *
2015                          * ITS#4338: if the stream is invalid, there is no need to
2016                          * close it here. It has already been closed in connection.c.
2017                          */
2018                         if ( connection_write( wd ) < 0 ) {
2019                                 if ( SLAP_EVENT_IS_READ( wd )) {
2020                                         SLAP_EVENT_CLR_READ( (unsigned) wd );
2021                                         nrfds--;
2022                                 }
2023                         }
2024                 }
2025
2026                 for ( i = 0; nrfds > 0; i++ ) {
2027                         ber_socket_t rd;
2028 #ifdef HAVE_WINSOCK
2029                         rd = readfds.fd_array[i];
2030 #else
2031                         if( ! SLAP_EVENT_IS_READ( i ) ) continue;
2032                         rd = i;
2033 #endif
2034                         SLAP_EVENT_CLR_READ( rd );
2035                         nrfds--;
2036
2037                         Debug ( LDAP_DEBUG_CONNS,
2038                                 "daemon: read activity on %d\n", rd, 0, 0 );
2039                         /*
2040                          * NOTE: it is possible that the connection was closed
2041                          * and that the stream is now inactive.
2042                          * connection_read() must valid the stream is still
2043                          * active.
2044                          */
2045
2046 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2047                         connection_read_activate( rd );
2048 #else
2049                         connection_read( rd );
2050 #endif
2051                 }
2052 #else   /* !SLAP_EVENTS_ARE_INDEXED */
2053         /* FIXME */
2054         /* The events are returned in an arbitrary list. This is true
2055          * for /dev/poll, epoll and kqueue. In order to prioritize things
2056          * so that we can handle wake_sds first, listeners second, and then
2057          * all other connections last (as we do for select), we would need
2058          * to use multiple event handles and cascade them.
2059          *
2060          * That seems like a bit of hassle. So the wake_sds check has been
2061          * skipped. For epoll and kqueue we can associate arbitrary data with
2062          * an event, so we could use pointers to the listener structure
2063          * instead of just the file descriptor. For /dev/poll we have to
2064          * search the listeners array for a matching descriptor.
2065          *
2066          * We now handle wake events when we see them; they are not given
2067          * higher priority.
2068          */
2069 #ifdef LDAP_DEBUG
2070                 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
2071
2072                 for (i=0; i<ns; i++) {
2073                         int     r, w;
2074
2075                         /* Don't log listener events */
2076                         if ( SLAP_EVENT_IS_LISTENER(i)
2077 #ifdef LDAP_CONNECTIONLESS
2078                                 && !((SLAP_EVENT_LISTENER(i))->sl_is_udp)
2079 #endif
2080                                 )
2081                         {
2082                                 continue;
2083                         }
2084
2085                         /* Don't log internal wake events */
2086                         if ( SLAP_EVENT_FD( i ) == wake_sds[0] ) continue;
2087
2088                         r = SLAP_EVENT_IS_READ( i );
2089                         w = SLAP_EVENT_IS_WRITE( i );
2090                         if ( r || w ) {
2091                                 Debug( LDAP_DEBUG_CONNS, " %d%s%s", SLAP_EVENT_FD(i),
2092                                     r ? "r" : "", w ? "w" : "" );
2093                         }
2094                 }
2095                 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
2096 #endif
2097
2098                 for (i=0; i<ns; i++) {
2099                         int rc = 1, fd;
2100
2101                         if ( SLAP_EVENT_IS_LISTENER(i) ) {
2102 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2103                                 rc = slap_listener_activate( SLAP_EVENT_LISTENER( i ));
2104 #else
2105                                 rc = slap_listener( SLAP_EVENT_LISTENER( i ));
2106 #endif
2107                         }
2108
2109                         /* If we found a regular listener, rc is now zero, and we
2110                          * can skip the data portion. But if it was a UDP listener
2111                          * then rc is still 1, and we want to handle the data.
2112                          */
2113                         if ( rc ) {
2114                                 fd = SLAP_EVENT_FD( i );
2115
2116                                 /* Handle wake events */
2117                                 if ( fd == wake_sds[0] ) {
2118                                         char c[BUFSIZ];
2119                                         waking = 0;
2120                                         tcp_read( wake_sds[0], c, sizeof(c) );
2121                                         break;
2122                                 }
2123
2124                                 if( SLAP_EVENT_IS_WRITE( i ) ) {
2125                                         Debug( LDAP_DEBUG_CONNS,
2126                                                 "daemon: write active on %d\n",
2127                                                 fd, 0, 0 );
2128
2129                                         SLAP_EVENT_CLR_WRITE( i );
2130
2131                                         /*
2132                                          * NOTE: it is possible that the connection was closed
2133                                          * and that the stream is now inactive.
2134                                          * connection_write() must valid the stream is still
2135                                          * active.
2136                                          */
2137                                         if ( connection_write( fd ) < 0 ) {
2138                                                 continue;
2139                                         }
2140                                 }
2141                                 /* If event is a read */
2142                                 if( SLAP_EVENT_IS_READ( i )) {
2143                                         Debug( LDAP_DEBUG_CONNS,
2144                                                 "daemon: read active on %d\n",
2145                                                 fd, 0, 0 );
2146
2147                                         SLAP_EVENT_CLR_READ( i );
2148 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2149                                         connection_read_activate( fd );
2150 #else
2151                                         /*
2152                                          * NOTE: it is possible that the connection was closed
2153                                          * and that the stream is now inactive.
2154                                          * connection_read() must valid the stream is still
2155                                          * active.
2156                                          */
2157                                         connection_read( fd );
2158 #endif
2159                                 } else {
2160                                         Debug( LDAP_DEBUG_CONNS,
2161                                                 "daemon: hangup on %d\n", fd, 0, 0 );
2162                                 }
2163                         }
2164                 }
2165 #endif  /* SLAP_EVENTS_ARE_INDEXED */
2166
2167 #ifndef HAVE_YIELDING_SELECT
2168                 ldap_pvt_thread_yield();
2169 #endif
2170         }
2171
2172         if( slapd_shutdown == 1 ) {
2173                 Debug( LDAP_DEBUG_ANY,
2174                         "daemon: shutdown requested and initiated.\n",
2175                         0, 0, 0 );
2176
2177         } else if ( slapd_shutdown == 2 ) {
2178 #ifdef HAVE_NT_SERVICE_MANAGER
2179                         Debug( LDAP_DEBUG_ANY,
2180                                "daemon: shutdown initiated by Service Manager.\n",
2181                                0, 0, 0);
2182 #else /* !HAVE_NT_SERVICE_MANAGER */
2183                         Debug( LDAP_DEBUG_ANY,
2184                                "daemon: abnormal condition, shutdown initiated.\n",
2185                                0, 0, 0 );
2186 #endif /* !HAVE_NT_SERVICE_MANAGER */
2187         } else {
2188                 Debug( LDAP_DEBUG_ANY,
2189                        "daemon: no active streams, shutdown initiated.\n",
2190                        0, 0, 0 );
2191         }
2192
2193         if( slapd_gentle_shutdown != 2 ) close_listeners ( 0 );
2194
2195         if( !slapd_gentle_shutdown ) {
2196                 slapd_abrupt_shutdown = 1;
2197                 connections_shutdown();
2198         }
2199
2200         Debug( LDAP_DEBUG_ANY,
2201             "slapd shutdown: waiting for %d threads to terminate\n",
2202             ldap_pvt_thread_pool_backload(&connection_pool), 0, 0 );
2203         ldap_pvt_thread_pool_destroy(&connection_pool, 1);
2204
2205         free ( slap_listeners );
2206         slap_listeners = NULL;
2207
2208         return NULL;
2209 }
2210
2211
2212 #ifdef LDAP_CONNECTIONLESS
2213 static int connectionless_init(void)
2214 {
2215         int l;
2216
2217         for ( l = 0; slap_listeners[l] != NULL; l++ ) {
2218                 Listener *lr = slap_listeners[l];
2219                 long id;
2220
2221                 if( !lr->sl_is_udp ) {
2222                         continue;
2223                 }
2224
2225                 id = connection_init( lr->sl_sd, lr, "", "", CONN_IS_UDP, (slap_ssf_t) 0, NULL );
2226
2227                 if( id < 0 ) {
2228                         Debug( LDAP_DEBUG_TRACE,
2229                                 "connectionless_init: failed on %s (%d)\n", lr->sl_url, lr->sl_sd, 0 );
2230                         return -1;
2231                 }
2232                 lr->sl_is_udp++;
2233         }
2234
2235         return 0;
2236 }
2237 #endif /* LDAP_CONNECTIONLESS */
2238
2239 int slapd_daemon( void )
2240 {
2241         int rc;
2242
2243         connections_init();
2244 #ifdef LDAP_CONNECTIONLESS
2245         connectionless_init();
2246 #endif
2247
2248 #define SLAPD_LISTENER_THREAD 1
2249 #if defined( SLAPD_LISTENER_THREAD )
2250         {
2251                 ldap_pvt_thread_t       listener_tid;
2252
2253                 /* listener as a separate THREAD */
2254                 rc = ldap_pvt_thread_create( &listener_tid,
2255                         0, slapd_daemon_task, NULL );
2256
2257                 if ( rc != 0 ) {
2258                         Debug( LDAP_DEBUG_ANY,
2259                         "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
2260                         return rc;
2261                 }
2262
2263                 /* wait for the listener thread to complete */
2264                 ldap_pvt_thread_join( listener_tid, (void *) NULL );
2265         }
2266 #else
2267         /* experimental code */
2268         slapd_daemon_task( NULL );
2269 #endif
2270
2271         return 0;
2272
2273 }
2274
2275 static int sockinit(void)
2276 {
2277 #if defined( HAVE_WINSOCK2 )
2278     WORD wVersionRequested;
2279         WSADATA wsaData;
2280         int err;
2281
2282         wVersionRequested = MAKEWORD( 2, 0 );
2283
2284         err = WSAStartup( wVersionRequested, &wsaData );
2285         if ( err != 0 ) {
2286                 /* Tell the user that we couldn't find a usable */
2287                 /* WinSock DLL.                                  */
2288                 return -1;
2289         }
2290
2291         /* Confirm that the WinSock DLL supports 2.0.*/
2292         /* Note that if the DLL supports versions greater    */
2293         /* than 2.0 in addition to 2.0, it will still return */
2294         /* 2.0 in wVersion since that is the version we      */
2295         /* requested.                                        */
2296
2297         if ( LOBYTE( wsaData.wVersion ) != 2 ||
2298                 HIBYTE( wsaData.wVersion ) != 0 )
2299         {
2300             /* Tell the user that we couldn't find a usable */
2301             /* WinSock DLL.                                  */
2302             WSACleanup();
2303             return -1;
2304         }
2305
2306         /* The WinSock DLL is acceptable. Proceed. */
2307 #elif defined( HAVE_WINSOCK )
2308         WSADATA wsaData;
2309         if ( WSAStartup( 0x0101, &wsaData ) != 0 ) return -1;
2310 #endif
2311
2312         return 0;
2313 }
2314
2315 static int sockdestroy(void)
2316 {
2317 #if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK )
2318         WSACleanup();
2319 #endif
2320         return 0;
2321 }
2322
2323 RETSIGTYPE
2324 slap_sig_shutdown( int sig )
2325 {
2326 #if 0
2327         Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0);
2328 #endif
2329
2330         /*
2331          * If the NT Service Manager is controlling the server, we don't
2332          * want SIGBREAK to kill the server. For some strange reason,
2333          * SIGBREAK is generated when a user logs out.
2334          */
2335
2336 #if HAVE_NT_SERVICE_MANAGER && SIGBREAK
2337         if (is_NT_Service && sig == SIGBREAK) {
2338                 /* empty */;
2339         } else
2340 #endif
2341 #ifdef SIGHUP
2342         if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0) {
2343                 slapd_gentle_shutdown = 1;
2344         } else
2345 #endif
2346         {
2347                 slapd_shutdown = 1;
2348         }
2349
2350         WAKE_LISTENER(1);
2351
2352         /* reinstall self */
2353         (void) SIGNAL_REINSTALL( sig, slap_sig_shutdown );
2354 }
2355
2356 RETSIGTYPE
2357 slap_sig_wake( int sig )
2358 {
2359         WAKE_LISTENER(1);
2360
2361         /* reinstall self */
2362         (void) SIGNAL_REINSTALL( sig, slap_sig_wake );
2363 }
2364
2365
2366 void slapd_add_internal(ber_socket_t s, int isactive) {
2367         slapd_add(s, isactive, NULL);
2368 }
2369
2370 Listener ** slapd_get_listeners(void) {
2371         return slap_listeners;
2372 }
2373
2374 void slap_wake_listener() {
2375         WAKE_LISTENER(1);
2376 }